Practice writing clear OpenAPI/Swagger documentation: operation summaries, parameter descriptions, response descriptions, and schema property documentation.
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What is the difference between 'summary' and 'description' in an OpenAPI operation?
OpenAPI summary (max 120 chars) appears in tooling lists and navigation. Description supports Markdown and is used for detailed documentation: business rules, rate limits, authentication notes, and examples.
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Which is the best OpenAPI operation summary?
Good OpenAPI summaries are concise (under 10 words), use verb phrases, and describe the outcome. 'Returns the authenticated user's profile data' is clear, specific, and action-oriented.
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How should a required path parameter be documented?
Parameter descriptions should include: what it identifies, format constraints, and an example. This prevents consumer errors and reduces support questions about unexpected 400 errors.
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What should a '200 OK' response description include?
Response descriptions should describe what is returned and any notable fields. 'Success' tells consumers nothing useful. Developers reading the docs need to know exactly what to expect in the response body.
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What is the recommended way to document an API error response (e.g., 400)?
Error response documentation should explain when this status occurs and common causes. This enables API consumers to write better error handling and reduces 'why am I getting a 400?' support tickets.
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How should you document a schema property that has a specific allowed set of values?
Documenting enum values with their meaning is essential. '"pending"' without explanation leaves consumers guessing. Describing what each state means prevents incorrect state machine handling in client code.
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What is the purpose of 'example' values in OpenAPI schema documentation?
Examples dramatically improve API documentation usability. A realistic example like 'email: user@example.com' or 'createdAt: 2024-01-15T10:30:00Z' is immediately clear, while 'email: string' or 'createdAt: ISO 8601 date' is abstract.
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What does 'nullable: true' communicate in an OpenAPI schema property?
Nullable and optional are different: optional means you can omit the field; nullable means you can set it to null. A 'completedAt' timestamp might be nullable (null = not yet completed) but not optional (always present in the response).
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Reviewer Comment
During a code review of a new API endpoint for user profile updates, Sarah flagged the following comment on the Swagger definition:
"This description is too vague. It doesn't clearly state what fields are *required* to update a user's name and email."
Which of the following best describes Sarah's concern and how it should be addressed in the OpenAPI documentation?
A. The 'summary' field is redundant and can be removed for brevity.
B. The description should only focus on the success response code (200 OK).
C. The description needs to explicitly define validation rules and required parameters for each operation, ensuring clarity for developers.
D. The 'example' value provided is sufficient to illustrate how to use the endpoint.
Sarah's comment highlights a critical aspect of OpenAPI documentation: clarity and specificity. A good description should always detail the input requirements—particularly required parameters and validation rules—to avoid ambiguity and ensure developers understand exactly what's needed to successfully use the API endpoint. Option B is incorrect because the description must cover more than just the successful response; it needs to define the *input* expectations. Option D is also wrong, as an example only shows one possible usage, not the complete requirements.
10 / 17
Reviewer Comment
During a code review of a new API endpoint for user profile updates, Sarah flagged the following comment on the Swagger definition:
"This description is too vague. It doesn't clearly state what fields are *required* to update a user's name and email."
Which of the following best describes Sarah's concern and how it should be addressed in the OpenAPI documentation?
A. The 'summary' field is redundant and can be removed for brevity.
B. The description should only focus on the success response code (200 OK).
C. The description needs to explicitly define validation rules and required parameters for each operation, ensuring clarity for developers.
D. The 'example' value provided is sufficient to illustrate how to use the endpoint.
Sarah's comment highlights a critical aspect of OpenAPI documentation: clarity and specificity. A good description should always detail the input requirements—particularly required parameters and validation rules—to avoid ambiguity and ensure developers understand exactly what's needed to successfully use the API endpoint. Option B is incorrect because the description must cover more than just the successful response; it needs to define the *input* expectations. Option D is also wrong, as an example only shows one possible usage, not the complete requirements.
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Reviewer Comment
During a code review of a new API endpoint for user profile updates, Sarah flagged the following comment on the Swagger definition:
"This description is too vague. It doesn't clearly state what fields are *required* to update a user's name and email."
Which of the following best describes Sarah's concern and how it should be addressed in the OpenAPI documentation?
A. The 'summary' field is redundant and can be removed for brevity.
B. The description should only focus on the success response code (200 OK).
C. The description needs to explicitly define validation rules and required parameters for each operation, ensuring clarity for developers.
D. The 'example' value provided is sufficient to illustrate how to use the endpoint.
Sarah's comment highlights a critical aspect of OpenAPI documentation: clarity and specificity. A good description should always detail the input requirements—particularly required parameters and validation rules—to avoid ambiguity and ensure developers understand exactly what's needed to successfully use the API endpoint. Option B is incorrect because the description must cover more than just the successful response; it needs to define the *input* expectations. Option D is also wrong, as an example only shows one possible usage, not the complete requirements.
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Reviewer Comment
During a code review of a new API endpoint for user profile updates, Sarah flagged the following comment on the Swagger definition:
"This description is too vague. It doesn't clearly state what fields are *required* to update a user's name and email."
Which of the following best describes Sarah's concern and how it should be addressed in the OpenAPI documentation?
A. The 'summary' field is redundant and can be removed for brevity.
B. The description should only focus on the success response code (200 OK).
C. The description needs to explicitly define validation rules and required parameters for each operation, ensuring clarity for developers.
D. The 'example' value provided is sufficient to illustrate how to use the endpoint.
Sarah's comment highlights a critical aspect of OpenAPI documentation: clarity and specificity. A good description should always detail the input requirements—particularly required parameters and validation rules—to avoid ambiguity and ensure developers understand exactly what's needed to successfully use the API endpoint. Option B is incorrect because the description must cover more than just the successful response; it needs to define the *input* expectations. Option D is also wrong, as an example only shows one possible usage, not the complete requirements.
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A developer is writing a Swagger description for an API endpoint. Which of the following best describes the purpose of using 'summary'?
The `summary` field in OpenAPI provides a concise description of the endpoint's purpose. It's intended to give users a quick understanding without needing to delve into the full details of the operation. Incorrect options misrepresent its role – it is not for technical details or automatic generation.
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Sarah is reviewing a PR that introduces a new API endpoint. The PR description includes the following:
`summary: "Get User Profile"
description: "Retrieves user profile data based on the provided ID."`
Which statement best reflects Sarah's feedback?
Sarah is likely requesting more detail in the `description`. While a `summary` provides a high-level overview, the `description` field should elaborate on *how* the endpoint achieves its purpose. It's where you'd include details about input validation or expected response formats.
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Mark is documenting a path parameter in his OpenAPI definition:
`path: /users/{userId}`
Which of the following best describes how he should document this?
Clear documentation of path parameters is crucial. Mark needs to specify the data type, validation rules (if any), and *how* it's used within the endpoint's logic. This helps consumers understand how to correctly format their requests and interpret the results.
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During a code review, David notices that the Swagger definition for a successful API response (200 OK) lacks detail. What should he add to the `description` field?
A successful 200 OK response description *must* detail the structure of the returned data. This includes specifying property names and their corresponding data types within the response body. This allows clients to correctly parse and utilize the response information.
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Emily is documenting a 400 Bad Request error response in her OpenAPI definition. What should she include in the `description` field?
A good 400 Bad Request description needs to explain *why* the request was invalid. This means detailing the specific validation errors that triggered the response. Providing this context helps developers quickly diagnose and fix their requests. It's not enough just to say 'invalid'.
What will I practice in "OpenAPI and Swagger Descriptions (English)"?
This is a Code Comments exercise set. It walks through 17 scenario-based multiple-choice questions built around real usage of Code Comments terminology that IT professionals encounter on the job.
Is this exercise free to use?
Yes. Every exercise on CoderSlingo, including this one, is free to complete with no account, sign-up, or paywall.
How many questions are in this exercise?
This set contains 17 questions. Each one shows immediate feedback and a detailed explanation after you answer, so you learn the correct usage right away rather than waiting for a final score.
Do I need prior experience to complete this exercise?
No prior experience is required. Each question includes a full explanation covering the reasoning behind the correct answer, so the exercise itself teaches the Code Comments vocabulary as you go.
Can I retry the exercise if I get questions wrong?
Yes — use the "Try again" button on the results screen to reset your answers and go through all the questions again. There is no limit on attempts.
Is my progress saved?
Your answers and score for the current session are tracked in the browser as you go. No account or login is needed, and there is nothing to install.
What if I don't understand a term used in a question?
Read the explanation shown after you answer each question — it breaks down the correct term in plain English with a real-world example. You can also check the site Glossary for quick definitions.
How is this different from reading a blog article on the topic?
Exercises like this one are interactive drills that test and reinforce specific vocabulary through multiple-choice questions, while blog articles explain concepts in prose. Practising here after reading builds active recall, not just passive recognition.
Where can I find more Code Comments exercises?
See the Code Comments exercises hub for the full set of related pages, or browse all exercise categories from the main Exercises index.
Can I use this exercise to prepare for a technical interview?
Yes — Code Comments vocabulary comes up often in technical discussions and interviews. Pair this exercise with our dedicated Interview Preparation section for role-specific practice.